Watch



(No Model.)

D. T. GARCIA.

WATCH.

No. 349,880. Patented Sept. 28, 1886.

IN'VENTOR 2 JJ BY ,(lum

ATTORNEYS.

N. Pnzns, Phnlmlilhcgnpher, Washington, D. c.

UNITED STATES PATENT OFFICE.

DOMINGO TORRES GARCIA, OF GUADALAJARA, MEXICO.

WATCH.

SPECIFICATION forming part of Letters Patent No. 349,880, dated September 28, 1886.

Application filed April 13, 1886. Serial No.198,704. (No model.)

To all whom it may concern:

Be it known that I, DOMINGO Tonnns GAR- em, a citizen of Mexico, residing at Guadalajara, have invented certain new and useful Improvements in lVatches, of which the following is a specification.

The object of my invention is to provide a new and improved watch, which is constructed with very few parts, indicates the time very accurately, and is not liable to get out of order.

The invention consists in the construction and combination of parts and details, as will be fully described/hereinafter, and pointed out more particularly in the claims, reference be: ing had to the accompanying drawings, in which- Figure 1 is a face View of my improved watch. Fig. 2 is a rear View of the works, the back of the case being removed. Fig. 3 is a cross'sectional view of the differential gearwheels. Fig. 4; is an enlarged cross-sectional view of the watch.

The open front of the watch-case A is provided with the usual pendant and bow, and with the central pivot, B,on which are mounted the two crown-wheels O and D, of which the wheel 0 is within the wheel D,the toothed edges of the flanges of the two wheels being in the same plane, as shown clearly in Figs. 8 and 4. The crown-wheel O is mounted rigidly upon the arbor B and turns with the same, while the crown-wheel D is provided with a central sleeve, which turns with slight friction on the arbor B. The wheel 0 has a few teeth less than the wheel D, for the purpose hereinafter described.

Upon the inner part of the arbor B is also fixed the pinion J, which engages with the cogwheel K, mounted on a spindle on which is also fixed a pinion, L. The pinion L engages with the primary cog-wheel m, mounted on the stem of the mainspring M and driven by the same in the ordinary manner.

Vith the teeth of both crown-wheels O and D engages, simultaneously, a pinion, E, mounted rigidly on a shaft, F, placed coincident with the diameters of the crown-wheels O D, and rotating in suitable bearings in the case A. On the inner end of the shaft F is fixed an ordinary crown scape-wheel, I, with the toothed flange of which engage alternately verge-pallets G, mounted on the verge I, projecting at right angles to the shaft F. On the rear end of the verge P is mounted the balance-wheel H, which is actuated by its hair-spring to reciprocate the pallets G in the usual manner. The outer face of the inner crowuwheel, G, is provided with a circular scale divided into twelve equal parts and so marked, to indicate the hours, as shown in Fig. 1. Each of these parts is subdivided with twelvesinallcrspaccs, each indicating five minutes.

The outer crown-wheel, D, is cut away to form spokes D, and thus permit inspection of the scale on the inner wheel, 0, and it is provided with the pointer, O, which registers with the divisions of the said scale.

On the inner edge of the rim of the outer wheel, D, is also produced a circular scale with the divisions of which afiXed pointer, N, on the case A registers. The scale on the wheel D is divided into five equal parts, indicating the minutes from one to five, and each again subdivided into sixty parts, indicating the seconds, making three hundred divisions in all on the scale.

The operation of the watch is as follows: The pinion J on the central arbor, B, is rotated by the inainspring M through the gearwheels m L K, in the usual manner. The inner crownwheel, O, fixed on the arbor B, is thus rotated, turning the pinion E, whereby the outer crown -wheel, D, is also revolved. The crown scape-wheel I on the rotating shaft F of the pinion B, being engaged on opposite sides of its flange alternately by vergepallets G, is controlled by the same in the ordinary manner. The rotation of the crown wheels 0 D is thus regulated, and the numbers of teeth on the pinion E, crown-wheel D, and scape-wheel I are so proportioned and the hair-spring balancewheel H so adjusted that the outer crown-wheel, D, is revolved once in five minutes or three hundred seconds, so that its small divisions denote seconds, as indicated by the fixed pointer N on the case. lVe will suppose that the inner crown-wheel, O, has two hundred and eightyeight teeth, and the outer crown-wheel, D, has two hundred and ninety teeth, and that they start from the position shown in Fig. 1, wherein the fixed pointer N is in register with the primary division of the scale on the outer wheel, D, and the pointer O on the wheel D coincides with the division marked 12 on the scale of the inner wheel, 0, the rotation of both wheels being in the direction of the ar row, Fig. 1. Then when the wheel D has completed one revolution the wheel 0 will have made one revolution and two teeth more, the wheel D thus slipping slightly on its pivot B. When the wheel D has made twelve revolutions, indicating one hours time, the wheel 0 will have made 12 fit; 12, revolutions, so that the division marked 1 on the latter will coincide with the pointer O, correctly indicating the hour. When the wheel D has made one hundred and forty-four revolutions, indicating twelve hours, the wheel 0 will have made 12 :13 revolutions, and the in Ger: 0 correctly point to division 12 on the wheel 0, and so on.

It is evident that different combinations of numbers may be used for the teeth of wheels 0 and D, and the scales on the latter be variously divided according to circumstances. The esoapement may also be variously geared with the crown-wheels O and D, and may be of any suitable style.

Having fully described my invention, what I desire to claim and secure by Letters Patent 1s 1. In a watch, the combination, with the case, of two crown-wheels mounted on the same arbor, one wheel having one or more teeth more than the other, and of a pinion o-smoau the otherrigidly, and-one crown-wheel having a.few more teeth than the other, and of a pinion on the escapement-arbor in gear with the teeth of both crown-wheels, substantially as shown and described.

3. In a watch, the combination, with a case,

vment-arbor in gear with the teeth of both wheels, substantially as specified.

4. In a watch, the combination, with a case, of two crown-wheels mounted on anarbor'in the case, one of the wheels having a fewteeth more than the other, a pinion engagjpgwith the teeth of both crown-wheels, a-shaft carrying the pinion, a crown scape-wheel on the shaft, and pallets and balance-wheel controlling the motion of the scape-wheel, substantially as shown and described.

5. In a watch, the combination, with the case, of the spindle or arbor B inithe same, gearing for revolving the spindle from the mainspring, the crown-wheels G D on the arbor, the wheel D being mounted loosely and having a few teeth more than the wheel 0, which is mounted rigidly, the pointer O on the open wheel D, registering with the circular scale on wheel 0, a fixed pointer registering with the scale on wheel D, and an escapement in gear with both wheels 0 and D, substantially as specified.

DOMINGO TORRES GARCIA. WVitnesses:

N ICOLEIS PUGA, ANTONIO ARRONIZ. 

